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295 lines
8.4 KiB
295 lines
8.4 KiB
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/*
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Copyright (c) 2003,2004,2005 Clarence Dang <dang@kde.org>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define DEBUG_KP_SELECTION_DRAG 0
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#include <kpselectiondrag.h>
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#include <tqdatastream.h>
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#include <kdebug.h>
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#include <kppixmapfx.h>
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#include <kpselection.h>
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// public static
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const char * const kpSelectionDrag::selectionMimeType = "application/x-kolourpaint-selection";
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kpSelectionDrag::kpSelectionDrag (TQWidget *dragSource, const char *name)
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: TQImageDrag (dragSource, name)
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{
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}
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kpSelectionDrag::kpSelectionDrag (const TQImage &image, TQWidget *dragSource, const char *name)
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: TQImageDrag (image, dragSource, name)
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{
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}
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kpSelectionDrag::kpSelectionDrag (const kpSelection &sel, TQWidget *dragSource, const char *name)
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: TQImageDrag (dragSource, name)
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{
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setSelection (sel);
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}
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kpSelectionDrag::~kpSelectionDrag ()
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{
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}
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// public
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void kpSelectionDrag::setSelection (const kpSelection &sel)
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{
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if (!sel.pixmap ())
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{
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kdError () << "kpSelectionDrag::setSelection() without pixmap" << endl;
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return;
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}
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m_selection = sel;
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// OPT: an awful waste of memory storing image in both selection and TQImage
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// HACK: need to set image else TQImageDrag::format() lies
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setImage (kpPixmapFX::convertToImage (*m_selection.pixmap ()));
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}
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// protected
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bool kpSelectionDrag::holdsSelection () const
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{
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return bool (m_selection.pixmap ());
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}
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// public virtual [base TQMimeSource]
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const char *kpSelectionDrag::format (int which) const
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{
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#if DEBUG_KP_SELECTION_DRAG && 0
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kdDebug () << "kpSelectionDrag::format(" << which << ")" << endl;
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#endif
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const char *ret = TQImageDrag::format (which);
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if (ret)
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{
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#if DEBUG_KP_SELECTION_DRAG && 0
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kdDebug () << "\tTQImageDrag reports " << ret << endl;
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#endif
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return ret;
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}
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int i;
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for (i = 0; TQImageDrag::format (i); i++)
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;
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#if DEBUG_KP_SELECTION_DRAG && 0
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kdDebug () << "\tend of TQImageDrag format list at " << i << endl;
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#endif
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if (i == which)
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{
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#if DEBUG_KP_SELECTION_DRAG && 0
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kdDebug () << "\treturning own mimetype" << endl;
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#endif
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return kpSelectionDrag::selectionMimeType;
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}
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else
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{
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#if DEBUG_KP_SELECTION_DRAG && 0
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kdDebug () << "\treturning non-existent" << endl;
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#endif
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return 0;
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}
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}
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// public virtual [base TQMimeSource]
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// Don't need to override in TQt 3.2 (the TQMimeSource base will work)
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// but we do so just in case TQImageDrag later decides to override it.
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bool kpSelectionDrag::provides (const char *mimeType) const
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "kpSelectionDrag::provides(" << mimeType << ")" << endl;
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#endif
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if (!mimeType)
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return false;
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return (!strcmp (mimeType, kpSelectionDrag::selectionMimeType) ||
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TQImageDrag::provides (mimeType));
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}
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// public virtual [base TQMimeSource]
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TQByteArray kpSelectionDrag::encodedData (const char *mimeType) const
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "kpSelectionDrag::encodedData(" << mimeType << ")" << endl;
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#endif
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if (!mimeType)
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return TQByteArray ();
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if (!strcmp (mimeType, kpSelectionDrag::selectionMimeType))
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{
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TQByteArray ba;
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TQDataStream stream (ba, IO_WriteOnly);
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\twant it as kpSelection in TQByteArray" << endl;
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#endif
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if (holdsSelection ())
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\t\thave selection - return it" << endl;
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#endif
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stream << m_selection;
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}
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else
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\t\thave image - call kpSelectionDrag::decode(TQImage)" << endl;
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#endif
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TQImage image;
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if (kpSelectionDrag::decode (this, image/*ref*/))
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\t\t\tok - returning sel with image w="
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<< image.width ()
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<< " h="
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<< image.height ()
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<< endl;
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#endif
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TQPixmap pixmap = kpPixmapFX::convertToPixmapAsLosslessAsPossible (image);
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stream << kpSelection (kpSelection::Rectangle,
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TQRect (0, 0, pixmap.width (), pixmap.height ()),
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pixmap);
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}
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else
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{
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kdError () << "kpSelectionDrag::encodedData(" << mimeType << ")"
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<< " kpSelectionDrag(TQImage) could not decode data into TQImage"
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<< endl;
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stream << kpSelection ();
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}
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}
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return ba;
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}
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else
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\twant it as TQImage in TQByteArray" << endl;
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#endif
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return TQImageDrag::encodedData (mimeType);
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}
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}
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// public static
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bool kpSelectionDrag::canDecode (const TQMimeSource *e)
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "kpSelectionDrag::canDecode()" << endl;
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#endif
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if (!e)
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return false;
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return (e->provides (kpSelectionDrag::selectionMimeType) ||
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TQImageDrag::canDecode (e));
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}
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// public static
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bool kpSelectionDrag::decode (const TQMimeSource *e, TQImage &img)
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "kpSelectionDrag::decode(TQImage)" << endl;
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#endif
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if (!e)
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return false;
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return (TQImageDrag::canDecode (e) && // prevents X errors, jumps based on unitialised values...
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TQImageDrag::decode (e, img/*ref*/));
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}
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// public static
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bool kpSelectionDrag::decode (const TQMimeSource *e, kpSelection &sel,
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const kpPixmapFX::WarnAboutLossInfo &wali)
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "kpSelectionDrag::decode(kpSelection)" << endl;
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#endif
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if (!e)
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return false;
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if (e->provides (kpSelectionDrag::selectionMimeType))
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\tmimeSource provides selection - just return it in TQByteArray" << endl;
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#endif
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TQByteArray data = e->encodedData (kpSelectionDrag::selectionMimeType);
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TQDataStream stream (data, IO_ReadOnly);
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// (no need for wali as kpSelection's by definition only support TQPixmap's)
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stream >> sel;
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}
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else
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\tmimeSource doesn't provide selection - try image" << endl;
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#endif
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TQImage image;
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if (kpSelectionDrag::decode (e, image/*ref*/))
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "\tok w=" << image.width () << " h=" << image.height () << endl;
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#endif
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sel = kpSelection (kpSelection::Rectangle,
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TQRect (0, 0, image.width (), image.height ()),
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kpPixmapFX::convertToPixmapAsLosslessAsPossible (image, wali));
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}
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else
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{
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#if DEBUG_KP_SELECTION_DRAG
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kdDebug () << "kpSelectionDrag::decode(kpSelection) mimeSource had no sel "
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"and could not decode to image" << endl;
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#endif
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return false;
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}
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}
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return true;
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}
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#include <kpselectiondrag.moc>
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